AP BIOLOGY

Detailed explanation-1: -Restriction enzymes, also called restriction endonucleases, recognize a specific sequence of nucleotides in double stranded DNA and cut the DNA at a specific location. They are indispensable to the isolation of genes and the construction of cloned DNA molecules.

Detailed explanation-2: -Where do restriction enzymes come from? Restriction enzymes are found in bacteria. Bacteria use restriction enzymes to kill viruses – the enzymes attack the viral DNA and break it into useless fragments.

Detailed explanation-3: -Restriction enzymes are DNA-cutting enzymes.

Detailed explanation-4: -Restriction enzymes dismantle foreign DNA by cutting it into fragments. This disassembling process is called restriction. Recombinant DNA technology relies on restriction enzymes to produce new combinations of genes.